Originally Posted by busdriver1959

Harbor Freight has an adjustable reamer set that would have the correct sizes for about 60-70 dollars. I got one but haven't used it yet so I don't know if the cutters are made of steel or a secret Chinese mix of cadmium, zinc, lead and raw sewage.
Either way, don't ream it to a wall thickness less than 1.5 mm unless you want your dentist to be able to buy that Ferrari he's been drooling over.